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OGR - Process and Transform Vector Data

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before I start getting too old you are I would like to cover some of the geospatial 5 formants so 1 of the most of important parts about bottom is that a simple feature standard which describes how to right by geospatial data so you would have liked points like line strings like polygons and all these are sanitized and this has to be important for the next 5 formants most of their so 1 of our common 1 which is the often online instead you Jason which is basically just adjacent file with some additional attributes and on and check yet so and then you have an additional geometry on Kong that's it so you have the property is near the geometry physically all the data we will come with here is that you have so column or and that should be which is the geometry and then you have additional attributes like the title of name whatever you want the another popular file format which is not directly related Saudis topics on which you see also often line is the trouble Jason which is used for the free this is a data visualization error-filled 4 joules fits and It's fairly color was a was to
to another 1 which is probably the most but the most used but the most ratified for it is the every shape file it's basically a mass so you have like and you have 4 files every time you work with file of files you you wanted to have 1 file for the whole thing you don't wanna have 4 different files which all do something different and are different sports so this is basically just a small in 5 which are converted to a shape or this year have already for files and you have no idea what to do so just to get quickly and lowered and so you have the the shape of the SHP file which is of future geometry and of any of the message for us they sh ix file which is the index formats then you have we have filed flawed attributes and then you have a projection of the projection so this is an optional and then you have like a bowl of soup waters but utterances which I find pretty good is that also called you package and and the spatial light format but both formats are based on SQL lights so there are basically databases which are stored in a file system so you have 1 and is the whole database so everything is inside on the geometry column there is a well-known binary and the difference is the spatial lights require some additional iris to be used and it also offers some additional functionality another 1 which I will cover here but my next we going next speaker will cover is the poster as which is a database of everyone all 1 form and I want
to show because it's sort of physical least I'd came from Linked Data is geography markup language so it's a XML-based language shop format which is based on the is far resource description framework so it came from the Linked Data world and its stock took part of the old you see the openly was called Open Geospatial Consortium of do the days to standardize formats and then I take you home of language which is used for the cool on Google Earth this 1 took this form that ended so this plan that it's some starting to so this is how it looks like it's the common XML messaging with usually the and then another 1 which often see if you use like a GPS tracking device and phone Orioles smart watch alarm which is used for describing waypoints tracks and routes it's also in the summer of format it is also very common to see around so you also can store a larger spatial data in this is needed basically just have another column for the magnitude wanted or you have a well-known texts parts to the file yes so it's go to the OGI that what is basically like before its of its extension for vector data so it's partied all and it supports the majority of geospatial 5 formants so 1 of you have basically freeze things which show here is that forward so where you can get some information similar to g dot info and then you have followed your told you a commandments will to Humbert's of geospatial data and then finally I'll show you some but by combining as well so if you do ja info you get like this a little information life you wanna see the different formats that there you can you know performance again logicically can alter the so the the exclamation mark is only used for larger but there is something to be so you can execute calls him that hold Jupiter OK so for
example if you want to have a file
but if you want to analyze what is in the fine you can do all those SQL queries so you can say OK selects everything from chapters so and file college-entrance adjacent fall on the way here and I I want to get all the data shown will by the programs so this is basically all you get this in a similar like the some before we you don't
and so you can do other queries like you can also do you can the council of all the features that you have then you will get like in this case 111 all features and then you can get like a single features or in this case we want so all chapters were title is at times also so you will get heated information for that and still a Swiss Army
knife for morphology of spatial of science in my opinion is the old yacht soldier so any any intensely powerful tool you can use it for almost a kind word that you can imagine you can do all of the bases with it so you can do a whole lot it the debate is it is just you have the old you are told you done best formats and input output and then you have like a whole lot of other options that you can all the use so you can do so all different kind of formants with a Bash at the hands on for example if you wanna converted you adjacent to due package you would have this symbol of commands to is something artists their chefs for foredune Pakistan the all produce packaged and the input Jason and progress if you want a progress bar to see how it worked otherwise nothing would have been displayed here if you wanna converted you Jason to is in it work as follows you would have a conditional but action by this command so it was a cold sirens argument where you find the that's their geometries as X and Y but stories X and Y so will have another column indices file which is X and Y you can also do is see as you to G adjacent then you would have to ask this years of what yes this is this is not an error this is this is when you have a large file you will get this message here that the progress won't work on 0 and then you can also come word you adjacent to post as then you would have but you need to have the information for the rest so that the database named all stress the holes the user and the password if you have set and then you can have a low father of parameters which you can choose you can for example change the table name with this command and and then you have to impose generous so as I said before it can use g are also with piping you you have various different data drivers so as we saw before you you have thought you package here the as the adjacent you Jason and you can use these of drivers by specifying that the driver code here so in this league you will see a whole list of all the files you can use and then you can buy create driver for his file formats and then you can open this file of this and then you can do whatever we want and then you have to destroy the source in case you use scripts are longer or you can use a garbage collector butcher the for
example if you wanna get away at this would look like this you would have the this summer for the source of the data sources then you can get layout would get where and then you can get some additional information about the layers so like the number of features here and they extend them whole order of information as well from what I forgot to say that you when you use O G R you have fled difference on you have a layer you have featured in have a geometry and then you have your lot long-stored year and in this case if we want to see the future so we have the we have to get 1st layer we have we can have multiple layers a file then we can get the feature we can have multiple features in the fall and then we can get for his teacher a geometry and in the future you have thought of things like fuel waste or additional attributes when you can get in this case it was a point so you can get x and y coordinates of the points yes so if you want to feature a trend of all features you can do this with this from very simple and so what if you wanna create a file
you have to do a little bit more so this whole thing up you want to have and according to the title and in this case the 1 I have the you Jason you create a driverless all before you create the layer you are specified in geometry time most the and you then you create a feature from this feature of what you want to create the fields and then you have this fields of so to the layer and then you create the geometry of the points and then you have the the points in geometry and then you add the menus of the feature and and then increase the feature in the layer and then you found me finish a business style the reason for this is because you were who such yet we have so many different so he foments of all they all have this simple features standard in in there so you have like the geometry and actions and they all have to obey his system and and that's why you have to always have a layer area
both it always has to have a layer of feature and on the field and the machine and that's why it's so so complicated so
yes well but this was what we
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Metadaten

Formale Metadaten

Titel OGR - Process and Transform Vector Data
Serientitel Maptime Salzburg
Autor Janakiev, Nikolai
Lizenz CC-Namensnennung 3.0 Deutschland:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/39176
Herausgeber Maptime Salzburg
Erscheinungsjahr 2018
Sprache Englisch
Produzent Miksch, Jakob
Produktionsjahr 2018
Produktionsort Salzburg

Inhaltliche Metadaten

Fachgebiet Informatik
Schlagwörter OGR
GDAL
Open Source
Geodata
Geospatial Data
Transformation
Python
Jupyter Notebook

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